On 14.04.2023 14:35, Andrei Borzenkov wrote:
On Fri, Apr 14, 2023 at 11:45 AM Philip Schiller
<p.schil...@plusoptix.de> wrote:
I would like to know if the order constraint <order drbd_vm_after_drbd_fs
Mandatory: ms-drbd_fs:promote drbd_vm>
is equivalent to: "First promote ms-drbd_fs then start drbd_vm".
No, it is not. It is equivalent to
order drbd_vm_after_drbd_fs Mandatory: ms-drbd_fs:promote drbd_vm:promote
which is effectively ignored (as drbd)vm is never promoted).
As far as I can tell, pacemaker simply does not support migration
together with demote/promote actions.
As a workaround you could add dummy clone resource colocated with and
ordered after your DRBD masters and order VM after this clone. Like
primitive drbd_fs ocf:pacemaker:Stateful \
op monitor role=Master interval=10s \
op monitor role=Slave interval=11s
primitive drbd_vm ocf:pacemaker:Dummy \
op monitor interval=10s \
meta allow-migrate=true
primitive dummy_drbd_fs ocf:pacemaker:Dummy \
op monitor interval=10s
primitive dummy_stonith stonith:external/_dummy \
op monitor interval=3600 timeout=20
clone cl-dummy_drbd_fs dummy_drbd_fs \
meta clone-max=2 clone-node-max=1 interleave=true
clone ms-drbd_fs drbd_fs \
meta promotable=yes promoted-max=2 clone-max=2 clone-node-max=1
promoted-node-max=1 interleave=true
location drbd_fs_not_on_qnetd ms-drbd_fs -inf: qnetd
order drbd_vm_after_dummy_drbd_fs Mandatory: cl-dummy_drbd_fs drbd_vm
location drbd_vm_not_on_qnetd drbd_vm -inf: qnetd
order dummy_drbd_fs_after_drbd_fs Mandatory: ms-drbd_fs:promote
cl-dummy_drbd_fs:start
location dummy_drbd_fs_not_on_qnetd cl-dummy_drbd_fs -inf: qnetd
colocation dummy_drbd_fs_with_drbd_fs inf: cl-dummy_drbd_fs
ms-drbd_fs:Master
which results in
Transition Summary:
* Stop drbd_fs:1 ( Master ha2 ) due to node availability
* Migrate drbd_vm ( ha2 -> ha1 )
* Stop dummy_drbd_fs:1 ( ha2 ) due to node availability
_______________________________________________
Manage your subscription:
https://lists.clusterlabs.org/mailman/listinfo/users
ClusterLabs home: https://www.clusterlabs.org/
